- Having students feel a metal and wooden object that are at room temperature to determine which feels cooler and why it feels cooler

- Determining the type of a metal using a calorimeter

- Putting dry ice into a balloon then tying it off and allowing the transition to gas fill the balloon

- Putting dry ice and a bit of water into a 2L bottle, closing the cap and allowing the expansion to explode the bottle (NOTE: THIS IS DANGEROUS AND APPROPRIATE SAFETY PRECAUTIONS SHOULD BE TAKEN. THE EXPLOSION HAD ENOUGH POWER TO BLOW OUT THE DRAIN OF THE SINK I WAS USING) If you lightly close the cap, it will blow the cap off. If you tightly close it, the bottle will blow.